Top-Rated Seedling Heat Mats in Australia for 2024

Heat mats are a great way of ensuring that your seeds get the heat they need to germinate properly.

If you’re growing your own plants from seed, then you probably know that germination can sometimes be a little tricky.

This is particularly the case if you are growing vegetable seedlings in a climate with a short growing period so want to speed up the germination process.

Heat mats are a great way of ensuring that your seeds get the heat they need to germinate and grow into healthy, strong plants. Some people even use them for fermenting bread!

In this guide, we round up the top seed mats in Australia to help you find the best one for your needs. After that, we provide a few tips for making your selection.

Our top pick: Inkbird Plus 20W Heating Mat

The Inkbird Plus is a high quality, affordable seedling heat mat that doesn’t compromise on safety or durability.

The heating pad is strong and flexible and easy to use. It is MET certificated (a USA and Canada safety certification) and constructed from high temperature resistant material that can be rolled up for storage.

The pad is rated to IP67 waterproof, making it easy to clean by rinsing and wiping. The heating pad is strong and flexible and easy to use.

This seedling heat mat maintains the temperature of the root area between 30C-40C when the ambient room temperature is around 20C.

Best with Thermostat: SeaHawk Propagation Heat Mat

The SeaHawk Propagation Heat Mat warms the root area by up to 7 °C above the ambient air temperature. This helps your seedlings germinate faster, and provides them with an ideal environment in which to grow.

It comes with a thermostat controller that allows you to set the precise temperature range you want for your growth medium.

While this makes it a bit more expensive than other options, it means you can set it anywhere between 20°C and 42°C. This allows you to choose exactly what’s best for the needs of your plant.

The Heat Mat plugs directly into the thermostat controller and provides constant optimum temperatures for your specific plant variety.

The SeaHawk Heat Mat is an excellent choice for anyone looking for a high-quality and great value germination heat mat with a thermostat controller.

Also great: AIICIOO Seedling Heat Mat

The AIICIOO Seedling Heat Mat is another great choice for those who want to improve their germination success rate.

This heat mat has been designed to promote plant root growth and increase the success rate of germination. It does this by raising the temperature of your growing area by about 10-20 degrees Celcius above ambient air temperature.

This can be especially helpful if you have less than ideal conditions in which to grow your seeds, or want to speed up the germination process in order to transport them outside at just the right time.

The compact design means that this heat mat is easy to store when it’s not in use (it can be rolled up) and is fully waterproof. It’s also durable and has a fray-proof design, so you don’t have to worry about accidentally damaging it while moving it around your home or greenhouse.

It’s slightly smaller than the Inkbird Plus heat mat but still quite large enough for most peoples needs. The only drawback is that it doesn’t have a thermostat, which could come in handy if you require precise temperature control.

Do you need a heat mat for seed germination?

A heat mat is not essential for germinating seeds. However, they can be very helpful for germination in some cases.

If you have a cold home or an unheated space that doesn’t provide adequate heat, a seedling heat mat will help your seedlings reach their full potential by raising the temperature in their environment.

In addition to helping speed up the germination process, using a heat mat also helps ensure consistent growth across multiple plants.

However, keep in mind that many seeds can germinate in fairly cool conditions, so don’t assume you need a heat mat for all types of seeds.

Benefits of using a heat mat

When you use a seedling heat mat, your plants will germinate faster and more consistently.

Seedling heat mats provide the right temperature for germination. The result is healthier and more productive plants that will be able to produce fruits or vegetables earlier than those without the right conditions.

If you’re growing vegetables, this can be especially helpful if your climate has a short growing period.

Do you need a thermostat on your heat mat?

A thermostat is a device that regulates the temperature of your heat mat. It takes the guesswork out of achieving the right soil temperature for germination.

A thermostat can be useful but is not essential for germinating seeds. As exact temperatures are not required for seed germination (the soil just needs to be within a usually broad temperature range), you can usually get away without a thermostat.

However, if you’re using your heat mat for seedling germination and want ultimate accuracy, we recommend purchasing one with a thermostat attached.

What to look for when choosing a heat mat

When choosing a heat mat, there are several factors to consider.

What size do you need? Heat mats are available in different sizes and lengths. Choose the one that best fits your growing needs.

How much do you want to spend? Heat mats range in price from around $15 up to around $70 (and even more).

There are also optional extras like thermostats that may be beneficial if you require precise control over temperatures.

Finally, look for a heat mat that is durable and easy to clean.


How long should seedlings stay on a heat mat?

Leave your seeds on the heat mat 24 hours a day until they germinate (produce their first root and sprout through the soil). This may take up to two weeks, depending on the variety.

What can I use instead of a heat mat for seedlings?

There are a range of clever ways you can increase the temperature of your seeds to promote germination, although none will provide the control of a heat mat and thermostat. These include a hot cupboard, warm lights, or filling a tray with warm water and placing it under the seed trays.

How hot is too hot for seed germination?

Maximum germination temperatures are usually between 30°C and 40°C. Optimal germination temperatures usually range from 15°C to 30°C.

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Steve Kropp

Based in Melbourne, Steve's passion is vegetable gardening, and he’s been writing about it for almost 5 years. He also loves all things DIY and is always looking for a new project. When not working on his own garden projects or blogging, Steve enjoys spending time with his family, cooking meals with produce harvested from his garden, and coaching his son’s footy team.


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